GAMMALN

Returns the natural logarithm of the gamma function, Γ(x).

Syntax

GAMMALN(x)

X     is the value for which you want to calculate GAMMALN.

Remarks

  • If x is nonnumeric, GAMMALN returns the #VALUE! error value.
  • If x ≤ 0, GAMMALN returns the #NUM! error value.
  • The number e raised to the GAMMALN(i) power, where i is an integer, returns the same result as (i - 1)!.
  • GAMMALN is calculated as follows:

Equation

where:

Equation

Example

The example may be easier to understand if you copy it to a blank worksheet.

ShowHow to copy an example

  • Create a blank workbook or worksheet.
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Selecting an example from Help

Selecting an example from Help
  • Press CTRL+C.
  • In the worksheet, select cell A1, and press CTRL+V.
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Formula Description (Result)
=GAMMALN(4) Natural logarithm of the gamma function at 4 (1.791759)
 
 
Applies to:
Excel 2003